What is the periodic period of the Halley comet?

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Sir Isaac Newton's friend Edmund Haley first discovered this comet in 1680, and his predecessors counted the orphans as having been presumed to be reflected in the earth's skies in 74–76 years. This comet is named after him.


The Halley Comet (officially named 1P / Halley) is better known as a short-duration comet. It is visible from the earth every 75 to 76 years. Heli is the only short-term comet that can be seen clearly with the naked eye from the Earth and is the only comet seen with the naked eye that appears twice in human life. Other comets appearing with the naked eye may be brighter and more visible but they appear only once in thousands of years.

Halley returned to the inner solar system by its astronomers in 240 BC. Observations and records have been recorded since. Clear records of the appearance of this comet were recorded by the Chinese, Babylonian, and medieval European rulers, but at that time it was not recognized as a recurring comet. It was first identified by the British astronomer Edmund Halley in 1705 as a recurring comet and was later named Halley comet after him.

The last time the Halley comet was seen in 1986 and the Agali meet would be 2062.

Just have a look at this picture, see how many passengers keep on seeing the sun from time to time.

And also see its tail appears in the sky. It is heated by the sunlight, then its nuclei come out from the year, such as caravans, anagen, hydrocarbons, hydroxyl, nitrogen hydrides, etc., which are defined in the head, nucleus, tail.

The Halley comet last appeared in the inner solar system in 1986, and will next appear in mid-2061.

Upon its entry in 1986, Halley became the first comet to be studied closely and in detail by a spacecraft. It provided the earliest observational data on the structure of Heli's navel and the mechanism of coma and tail formation. This observation provided the basis for long-standing concepts about the comet's structure, particularly Fred Whipple's 'Dirty Snow Ball' model. He correctly estimated the structure of Halley as being composed of a mixture of volatile substances such as water, carbon dioxide, ammonia, and dust. The data provided by this mission has greatly improved our thoughts about Heli. For example, we now understand that the surface of the Halley is largely made up of dust and non-volatile materials and only a small part of it is made up of ice or volatile matter.